Drilling-machine.



-H. WANAMAKER 611. MCALLISTER.

DHILLING MACHINE.

APPLICATION FILED MAR. 3i, 1913.

Patented Apk 13, 1915 2 SHEETS-SHEET l.

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DRILLING MACHINE.'

APPLlcAnoN min MAR. 3|. 1913.

Patented Apr. 13, 1915.

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HENRY WANAMKEN AND JOSEPH MQALLISTER, OF ALBANY, NEW YORK, ASSKGNOBS T0 CHICAGO JPNEUMATJIC TOOL COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION or NEW JEESEY.

DRILLING-MACHINE.

Specication of Letters Patent. Patented Apr., 113, 1915.,

napplication tiled March 31, 1913. Serial No. 757,819.

T0 all whom 'it may concern.'

Be it known that we, HENRY VVANAMAKER and J osErH MCALLISTER, of Albany, Albany county, New York, have invented certain 'new and useful Improvements in Drillingfor automatically restricting the depth of vpossibility of accident.

thehole being drilled to the required limit and to feed or force the cutting tool into the piece as the operation progresses.

@Wing to the great force necessary to hold ay drilling machine in place by means of the ordinary fixture during its operation, there is a tendency for such'machine to Work loose from itsconnection With the piece on which work is being done, which frequently occurs and often results in physical injury to the operators. Also the prior method in which such fixture is employed requires the loosening and tightening of the xture every time a; new -hole is to be drilled thereby adding much to the labor and greatly increasing the My drilling inachine .overcomes allof these objections inasmuch as it entirely dispenses with the use of such fixture by providing a fixture which is practically apart ofthe prime mover and .cause'sthe drill to ,be presented and to be f ed by motive fluid which 1n the present instance is the same motive fluid which actuates the prime mover. u

1n the drawings Figure 1 is a perspective fof .our drilling machine shown in Working position upon a boiler head; Fig. 2 an elevation thereof with the lower portion in section, the parts being the same as shown in Fig. lwith the exception of the throttle valve.; and Fig. 3 a top plan view of the yoke or frame which cooperates with, the prime mover and .which carrles the drilling teal. 1'-

`While our invention may partake of different embodiments Without departing 'from the scope of the claims, We prefer the embodiment as herein shown which will now be described.

Referring tothe particular construction herein described, the prime mover indicated generally by the reference figure 1 may be of any suitable construction and operated by suitable motive fluid 'such as compressed air butin the present instance such prime mover orengine is shown as. of the` corner drlll type with its rotatable spindle 2 at one extreme end'thereof. The motive fluid enters through the pipe 3 from the flexible hose Isupply pipe 1, the motive fluid being throttled or governed by a suitable hand operated valve 5. lln lFig. 1 this valve is shown as an ordinary 2-Way valve operated by a handle 6 and in Fig. 2 such valve is of thel type exemplified in Boyer Patent No. 663,355 dated September 19, 1899, the valve proper (not shown) being operated by lmeans of the sleeve 7. Extending in theline of the axis of the body of the prime mover andconnected therewith as hereinafter described is a frameI or yoke 8, preferably of the shape or form-ation clearly illustrated in `Figs. 1 and 2. This frame is extended at one end to form an arm 8a which contains a bearing for a short shaft 9 entering the hollow spindle 2 which as usual may have the ordinary Morse taper. ln this manner the shaft 9 is driven by the prime mover and such shaft also forms one of the connections be-` tween the prime mover and theframe or yoke. At its lower or outer end the shaft 9 is provided with a bevel gear 10 which meshes with a corresponding bevel gear 11 Secured to the outer end of the short shaft 12. This latter shaft has its bearings in an arm 8* of the yoke or frame and to its outer end is secured in suitable Way as by means of the taperedpin 13 the proper cutting tool 14.

, The other main' arm 8c of the yoke or vframe is provided with a piston chamber or outerend of this piston stem or plunger is hollow as shown at .16h for ai purpose hereinaftermade apparent. The outer or rear end :of thecylinder is connected in suitable manner with the supply of the motiveiuid asfed to the prime mover and in `the present instance this connection conthe port 19, whereby when the prime mover is operating the motive Viuid is at the same time admitted against the rear pressure area of the piston 16 to force such piston and its lunger outwardly, that is to the left in ig. 2v against the tension of a spring 20 arranged in the cylinder and around the plunger and intended to restore the piston to nrmal position when the motive fluid is cut o The -purpose of the piston and its plunger isto force or feed the tool to the work indicated by the reference letter A to the drill as the drilling operation proceeds and it is evident that this action is automatic because it occurs at the time of and as incident to the starting of the prime mover its opera- ,tionby the admission of motive fluid thereto, the admission of such motive fluid to the piston chamber 15 being simultaneous which represents the preferred construction and arrangement.

We prefer to provide our drilling machine with means for automatically restricting the depth of the hole being'drilledto the required limit and to this end the piston is rovided with a rod 21 formed separate or integral therewith and extending rearwardly through the screw cap 22 :closing the rear end of the piston chamber and through the packing 23 in such cap, such packing being provided with the usual gland nut 24. The outer end of the rod 21 1s screw-threaded and provided with an ad- 'ustable nut 25 and a lock nut 26. It will e evident that the nut 25 by coming into contact with the nut,24 will determine the 'extent of outward movement of the piston and its lunger and that by adjusting this nut 25 t e extent of outward movement may be determined. ln'this manner the feed of the work to the tool'may be stopped when such tool reaches the re uired depth of hole with the result that suc depth may be obtainedjto a nicety. The outer end of the plunger is; provided with the opening or cavity described in order to admit the cutting -tool in the drilling of holes in the plate brjsheet.

By the use of our invention the ordinary. xtures which are unreliable as hereinbefore made manifest are entirely dispensed with ke or frame which 1s connected bathe prime mover is so made as to take the lace of such a fixture and at the same time itieinbodies'the automatic features hereinbe- Ad the Aya racy and uniformity in the work is obtained which is not obtainable in drilling machines previously used for the same purposes.

We clalm:

1. In combination with a prime mover having a rotatable driving member, a frame arranged in a line parallel tothe axis of the prime mover and at an angle to said driving member, said frame having a bearing for said driving member, a cutting tool in such frame, and driving connections be tween said member and tool.

2. In combination with a prime mover having a rotatable driving member, a frame arranged in a line parallel to the axis of the prime mover and at an angle to said driving member, said frame having a bearing for said driving member, a cutting tool in such frame, driving connections between said member and tool, and fluid pressure operated meansl for feeding the tool to the work.

3. In combination with a prime mover having a rotatable driving member, a frame arranged in a line parallel to the'axis of the prime mover and at an angle to said drivingmember, said frame having a bearing for said driving member, a cutting tool in such frame, driving connections 'between said member and tool, said prime mover being' actuated by luid pressure, and means operated by the same fluid pressure as supplied to the prime mover for feeding the tool to the work.

4. ln combination with a prime mover having a rotatable driving member, a frame arranged in a line parallel to the axis of the prime mover and at an angle to said driving member, a cutting tool in such frame, driving connections between said member and tool, and fluid pressure operated means mounted in said frame for feeding the tool to the work.

5. 1n combination with a prime mover having a rotatable drivin member, a frame arranged in a line paralle to the axis of the prime mover and at an angle to said'driving member, a cutting tool in such frame, driving connections between said member and tool, and' Huid pressure operated means mounted in said frame for feeding the work to the tool comprising a cylinder in said frame, a piston therein having a plunger adapted to press against the work tv bring the toolv against the work, and means for supplying. fluid under pressure to the cylinder.

6. The combination with, a prime mover the tool against the work, said prime mover bil mamita having a rotatable driving member, a frame arranged in a line parallel to the axis of the prime mover and at an angle to said driving member, a cutting tool in such frame, driving connections between said member and tool, and fluid pressure operated means mounted in said. frame for feeding the work to the tool comprising a cylinder in said frame, a piston therein having a plunger adapted to press against the work to bring the tool. against the work, andmeans for supplying fluid under pressure to the cylinder, said plunger being hollow at its vouter end to accommodate the tool.

7, ln combination with a prime mover having a rotatable driving spindle, a frame, a shaft mounted to rotate therein and adapted to be operatively connected with the spindle, a second shaft mounted to rotate in the frame and operatively connected with the first shaft, a cutting tool carried by such second shaft, a cylinder in said frame, a piston therein having a plunger. adapted to press against the Work to -bring the tool against the work, and means for supplying' fluid under pressure to the cylinder.

` 8. lin combination with a lprime mover having a rotatable driving member, a frame arranged in a line parallel to the axis of the prime mover and at an angle to said driving member, a cutting tool in such frame, driving connections between said member and tool, and fluid pressure operated means mounted in said frame for feeding thework to the tool comprising a cylinder in said frame, a piston therein having a plunger adapted to press against the work to kbring being actuated by fluid under pressure, and means for supplying to the cylinder the same fluid under pressure as supplied to the prime mover. Y

9. lln combination with a prime mover having a rotatable driving member, a frame arrangedin a line parallel to the axis of the prime mover and at an angle to said driving member, a cutting tool in suchy frame, driving connections between said lmember and tool, and fluid pressure operated means mounted in said frame for feeding the work to the tool comprising a cylinder in said frame, a piston therein having a plunger adapted to press against the'work to brlng the tool against the work, said prime mover having a'uid pressure supply i. ipe, and a connection between, such pi e l the cyllnder for conveying .motive uid to the cylintool, fluid pressure actuated mechanism which is movable to feed the tool to thetoA work, and means for limiting the degree of K ing the degree of movement of such mechamsm.

12. lfn combination with' a prime mover having a rotatable driving spindle, a frame, a shaft mounted to rotate therein and adapted to be operatively connected with the spindle, a second shaft mounted to rotate in the frame and operatively connected with- Athe first shaft, a cutting tool carried by such second shaft, a cylinder in said frame, a piston therein having a plunger adapted to press against the work to bring the tool against the work, said piston havin a rod passing through one end of the cylin er, and an adjustable member thereon for limiting the outward movement of the piston.

13. lln ycombination with a prime mover having a rotatable driving spindle, a frame, a shaft mounted to rotate therein and adapted to be operatively connected with the spindle, a second shaft mounted to rotate in the frame and operatively connected with the first shaft, a cutting tool carried by such second shaft, a cylinder in said frame, a piston therein having a plunger adapted to press against the work to bring the tool against the work, said piston having a rod passing through one end of the cyllnder, and an adjustable nut therein adapted to contact the end of the cylinder to limit the outward movement of the iston.

HARRY "VAN l KlER. JSElPl-l McliS'lER. Witnesses:

Gino. A. i i

y l i .laluna G. Dawson. 

